Bug 724145: add telemetry for whether keyword.URL is user-set, r=jaws

browser/components/nsBrowserGlue.js

@@ -415,6 +415,9 @@ BrowserGlue.prototype = {
         browser.selectedTab = browser.addTab("about:newaddon?id=" + aAddon.id);
       })
     });
+
+    let keywordURLUserSet = Services.prefs.prefHasUserValue("keyword.URL");
+    Services.telemetry.getHistogramById("FX_KEYWORD_URL_USERSET").add(keywordURLUserSet);
   },
 
   _onQuitRequest: function BG__onQuitRequest(aCancelQuit, aQuitType) {

toolkit/components/telemetry/TelemetryHistograms.h

@@ -315,6 +315,7 @@ HISTOGRAM(THUNDERBIRD_INDEXING_RATE_MSG_PER_S, 1, 100, 20, LINEAR, "Gloda: index
 HISTOGRAM(FX_TAB_ANIM_OPEN_MS, 1, 3000, 10, EXPONENTIAL, "Firefox: Time taken by the tab opening animation in milliseconds")
 HISTOGRAM(FX_TAB_ANIM_CLOSE_MS, 1, 3000, 10, EXPONENTIAL, "Firefox: Time taken by the tab closing animation in milliseconds")
 HISTOGRAM_BOOLEAN(FX_CONTEXT_SEARCH_AND_TAB_SELECT, "Firefox: Background tab was selected within 5 seconds of searching from the context menu")
+HISTOGRAM_BOOLEAN(FX_KEYWORD_URL_USERSET, "Firefox: keyword.URL has a user-set value")
 HISTOGRAM(FX_IDENTITY_POPUP_OPEN_MS, 1, 1000, 10, EXPONENTIAL, "Firefox: Time taken by the identity popup to open in milliseconds")
 HISTOGRAM(FX_APP_MENU_OPEN_MS, 1, 1000, 10, EXPONENTIAL, "Firefox: Time taken by the app-menu opening in milliseconds")